Wolf Vollprecht

We're taking supply chain security seriously for the Conda ecosystem. That's why we integrate deeply with the @projectsigstore ecosystem for attestation – soon coming to recipes as well to validate source code (sdist, github release) attestations.

Many RISC-V experts at the @condaforge meeting today. This is going to move quickly! Pixi also just finished building for RISC-V, exciting stuff.

Clean desktop showing Pixi GUI app window listing build tasks and a terminal window displaying compilation logs on a bright yellow background

We're excited to announce Pixi GUI, developed by our working student Felix Häcker! With the goal to make Pixi accessible to a wider audience while also empowering expert users.

Find out more in Felix's blog post: prefix.dev/blog/introd...

🧪 Live experiment using notebook.link from @quantstack.bsky.social

A notebook with DataLab-Kernel (github.com/DataLab-Plat...), a Xeus-Python JupyterLite-compatible kernel, connects automatically to a running local DataLab app (datalab-platform.com).

No config. Auto-discovery.

It simply works.

Should @OpenRoboticsOrg support #Pixi as an co-official installation tool on Linux?

Join the converstation in the discource linked thread 🧵

We are thrilled to introduce notebook.link, a platform that lets you create, share, and run Jupyter notebooks instantly in your browser.

Powered by JupyterLite and WebAssembly, it supports Python, R, C++, and a full in-browser terminal experience.

📖 Read the full story: medium.com/@QuantStack/...

The official @NVIDIA cuda-python project now also uses Pixi!

#pixi #CUDA #NVIDIA

Pinning a dependency in Pixi is defaulting to semantic versioning, but there are more styles that you can use!

Did you know the channels have a priority to them? This can be important when you mix multiple channels in your Pixi workspace.

A conda package from GIT SOURCE? How?! 🤯 We might have been hinting at "pixi-build", but now we're unveiling what makes it work: pixi build backends. A build backend basically produces a "recipe" from language-specific metadata, and pixi build orchestrates the build.

Call for Participation: Package Managers devroom at FOSDEM 2026 We are excited to announce the Call for Participation for the Package Managers devroom at FOSDEM 2026, taking place on Saturday, 31st January 2026 at the Université libre de Bruxelles, Belgium.

PackagingCon is back in smaller format as a Devroom at FOSDEM 2026! We would love to see you there - and hear a lot of interesting talks.

blog.ecosyste.ms/2025/11/06/f...

[EuroPython 2025 — Terrace 2B on 2025-07-18]🎤 *Unlocking Hidden Power of Conda with Pixi by Ruben Arts, Julian Hofer* 🔗 https://ep2025.europython.eu/sessi... Unlocking Hidden Power of Conda with Pixi — Ruben Arts, Julian Hofer

Missed us at @europython? Here is the recording:

www.youtube.com/watch?v=HOq...

ROS with Pixi Video's about how to use Pixi and ROS packages together.

Learn how you can use Pixi with #ROS!

We've put together some videos to showcase some Pixi features that are helpful for ROS development.

YouTube Playlist: www.youtube.com/playlist?li...

#ROSCon #ROSCon2025

What ROS at an Airport Apple Store?!

Pixi makes installation so easy, we can install ROS anywhere now.

#ROSCon2025 #ROSCon #ROS

Pixi allows you to install ROS packages from a RoboStack channel with ease.This video shows you that on a MacBook but the same example works on Linux, Mac an... Multiple ROS Distro's on One Machine!

What!? Multiple #ROS distros on one machine 🤯.
No Docker, No VM, No dual-boot needed!

www.youtube.com/watch?v=oiX...

#ROSCon #ROSCon2025

Get your hands on stickers from @baszalmstra and @rarts_ruby at #ROSCon!

Plus, catch a sneak peek of our latest development work!

Cross compiling in the Conda ecosystem Cross compiling is a fundamental capability in modern software development, allowing developers to build packages for different architectures without needing access to the target hardware.

In our little deep dive series we're now exploring how cross-compilation in the Conda ecosystem works: prefix.dev/blog/cross-c.... Back in the days, @conda-forge.org rolled this out widely to support osx-arm64 early on, and now for linux-aarch64/ppc64le.

a man in a suit and tie is screaming with his mouth open and says holy crap are you seeing this ? ALT: a man in a suit and tie is screaming with his mouth open and says holy crap are you seeing this ?

I just tried Pixi from @prefix.dev for the first time.

PEP 804: An external dependency registry and name mapping mechanism Hello everyone! On behalf of my co-authors @pradyunsg, @rgommers, @mgorny and @msarahan, I’d like to share our work on this new PEP 804 “An external dependency registry and name mapping mechanism”. ...

I have submitted by first draft PEP! 📦

PEP 804 complements PEP 725 ([external] dependency metadata) with a mapping mechanism to translate ecosystem-agnostic identifiers to your favourite package manager.

More info:

- PEP 725: discuss.python.org/t/103890
- PEP 804: discuss.python.org/t/103891

Our server has recently delivered more than 1.000.000 packages for the first time. We've hit that mark a few more times since. Seeing this constant growth is fascinating and we are confident that our infrastructure will scale well beyond this number!

It's always a pleasure to get invoices from Azure. Why? Because it means our @condaforge.org sponsorship is being used! We have been sponsoring a big Windows machine through CirunHQ for the past year to build PyTorch, libmagma, and other hard-to-build software for Windows.

Mutex packages in the Conda world Mutex packages are a useful mechanism to guide the solver towards certain dependencies, mutually excluding other dependency trees.

We're continuing our little deep dive series into Conda packaging. Mutex packages are useful to guide the SAT solver into specific parts of the dependency tree, and globally select either a GPU or CPU variant or similar features for an environment. prefix.dev/blog/what-a...

Build C++ projects with Pixi Painless dependency management (including shared libraries), monorepos and CI/CD is here for C++/CMake projects with Pixi.

Package building with Pixi is being rolled out! Dive into our latest blog post on crafting C++ packages.

And guess what? It’s not just for C++; Pixi plays nice with Python, Rust, ROS, Mojo, and beyond!

prefix.dev/blog/pixi-b...

Today we're unveiling new Software Supply Chain features for the Conda ecosystem: the integration of Sigstore is in public beta on prefix! You can now create Sigstore attestations on Github Actions and cryptographically secure your supply chain with trusted publishing.

What linking means when installing a Conda package Package managers face a fundamental challenge: how to efficiently place files from a package cache into multiple environments without excessive disk usage or compromising isolation.

Another deep dive in the technology behind Conda package managers: file linking! Did you know that there are symlinks, hardlinks and reflinks? Reflinks are the best – copy on write is space efficient and isolates the cache.

Learn more: prefix.dev/blog/what-l...

The documentation of @conda-forge.org is improving with example recipes for Go and Rust packages – providing useful starting points to get MORE packages into our ecosystem!

“Raise your hand if you were able to install everything with pixi and run the simulation-based inference tutorial notebook.”
github.com/cranmer/sbi-...

Making it this easy to run complex robot simulations took >4 years. But the investment into Pixi and @RoboStack pays off - now you can start the new @GazeboSim / Turtlesim on macOS with a simple `pixi run start`. 🚀

#ROS #ROS2 #Gazebo @OpenRoboticsOrg

Virtual Packages in the Conda ecosystem Virtual packages are a neat trick to inject system requirements into the SAT solver and resolve for compatible packages automatically. In this blog post we talk about how they are used in the Conda ecosystem to support complex cross-platform package distributions.

Ever wondered how Conda and Pixi "know" to install CUDA packages only on GPU machines? 🤔

Meet virtual packages - a clever solution to inject system compatibility information to the SAT solver to ensure compatibility.

prefix.dev/blog/virtua...

Interested in Software Supply Chain Security? We are! That's why we helped to get `cosign` on conda-forge: `cosign` can be used to sign container images or other artifacts with `sigstore`, and you can now easily install it with `pixi global install cosign` 🎉